SKLPPE-BPI线上系列研讨会即将开讲！

　　华南理工大学制浆造纸工程国家重点实验室与不列颠哥伦比亚大学（The University of British Columbia, UBC）生物产品研究所（BioProducts Institute, BPI）将联合组织系列的线上交流研讨会，旨在通过研究人员的深入学术交流和讨论来促进双方团队的深度合作，共同推进生物质领域的发展，希望未来在学生培养、学术交流、课题研究等方面，将双方的合作推向更高水平。首期线上交流研讨会主题为多孔材料，将于2021年11月6日（周六）上午9:00-11:00（北京时间）召开，欢迎感兴趣的同行参与讨论，注册免费。

POROUS MATERIALS：SKLPPE-BPI JOINT WEBINAR

　　This first webinar is part of a series to be hosted by the State Key Laboratory of Pulp and Paper Engineering (SKLPPE) of South China University of Technology and The BioProducts Institute (BPI) of University of British Columbia. The two organizations intend to share their recent research activities, exchange ideas and catalyze communication of the two world-leading institutes. The webinars will be held every other month and will cover different topics, with two talks given each time. The topic of first webinar will be porous materials. Please find the poster attached. Registration is free.

DATE & TIME

　　Friday, November 5, from 6:00pm–8:00pm Pacific Time (Vancouver) and Saturday, November 6, from 9:00am-11:00am Beijing Time (Guangzhou).

Professor Orlando Rojas

Bioproducts Institute, University of British Columbia

E-mail: orlando.rojas@ubc.ca

　　Orlando Rojas is a Canada Excellence Research Chair and Director of the Bioproducts Institute. He received the Anselme Payen Award, the highest recognition in the area of cellulose and renewable materials and is an elected Fellow of the American Chemical Society (2013), the Finnish Academy of Science and Letters (2017) and recipient of the Tappi Nanotechnology Award (2015). Prof. Rojas is Associate editor of Biomacromolecules and Emeritus Editor of J. Dispersion Science and Technology. He is member of the Marcus Wallenberg Foundation Selection Committee and Honorary Chair of the Asia Pacific Young Scientists Association.  Prof. Rojas most recent research grants include the prestigious European Research Commission Advanced Grant (ERC-Advanced) and a Horizon H2020 project, among others.

　　Description: Control over the nanoscale architecture of a material enables fine tuning of its physical characteristics and associated functions. Depending on the performance demands, properties such as active surface area, density, optical response, transport characteristics and mechanical resilience can be tailored by nanostructuring. Herein, we exploit the liquid crystalline phase transitions in aqueous dispersions of highly anisometric, nanoscaled and high strength (EA > 150 GPa) cellulose nanocrystals (CNCs) to afford chiral-nematic ordered aerogels with controlled meso- and microstructures. Unprecedented levels of specific strength and toughness were achieved by controlling CNC assembly and derived architectures. We determined that the specific strength, and toughness, of CNC aerogels are improved by up to 137% and 60%, respectively, compared with the highest reported values for aerogels formed solely from cellulose nanofibrils or nanocrystals. Our results demonstrate that chiral-nematic ordered aerogels with controlled meso- and microstructures replicate the liquid crystalline phase transitions of CNCs in aqueous dispersions. The obtained architectures are evaluated systematically by varying the long-range order of the aqueous CNC dispersion from mostly isotropic to completely anisotropic. The resulting aerogels display a strong relationship between the mesopore fraction and selective light reflection (iridescence) as a function of mechanical load. Specifically, we find that the mechanical performance associated with pore compression under load is greatly enhanced by chiral-nematic ordering. The new limits in the mechanical properties of CNC-based aerogels point to new structural considerations for the synthesis of next generation porous constructs that exploit the inherent long-range order of such building blocks.

Professor Yan Chen

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology

E-mail: escheny@scut.edu.cn

　　Yan Chen is a professor at the School of Environment and Energy at the South China University of Technology. She received her B.S. and M.S. from Peking University (China), and Ph.D. from the Massachusetts Institute of Technology (USA). Prior to her current position, she worked as a postdoctoral fellow at MIT. Her research focuses on rational design of new materials to enable high performance, economical energy and environment devices based on understanding and controlling the surface and interface properties under extreme conditions (electric polarization, reactive environment, radiation, etc.). She is also working on the application of ion beam implantation in low dimensional materials for energy and electronics.

　　Description: Effective removal of heavy metals and organic pollutants from aquatic environment is in pressing need because of their detrimental effect to human health. Utilizing biomass such as lignin and hemicelluloses, which are the wastes derived from paper making industry, not only provides activate materials for water treatment, but also is beneficial for minimizing their impact the environment. Herein, we report a facile hydrothermal method to synthesis lignin-derived-carbon (LDC) based composites, including MoS2@LDC, Ca/Fe/Al-trimetallic layered double hydroxide (LDH)@LDC, FeS@LDC, for water treatment. The MoS2@LDC and LDH@LDC composites exhibit outstanding removal efficient for Cr(VI)/U(VI), and the removal capacity can be further enhanced by introducing defect into MoS2 and LDH functional layer via H2 plasma treatments. The sulfur vacancies in MoS2 generated by plasma treatment is found to improve the catalytic activity of MoS2 layer, leading to strongly enhanced Cr(VI) removal performance through reduction reaction. The defects in the LDH, on the other hand, effectively promote the ion exchange between the LDH layer and the heavy metal in the aquatic environment, resulting in strongly enhanced removal performance. The defective FeS@LDC shows outstanding degradation efficiency for antibiotic tetracycline (TC) with an reaction mechanism of Fenton reaction. The results obtained in this study can guide the rational design of high-performance environmental catalysts based on biomass-based composites.

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